RAF Menwith Hill, Harrogate, North Yorkshire in England
MenwithHillis aRoyal Air Force stationnearHarrogate, NorthYorkshire. On the site ofthe421stAir BaseSquadronisstationed, whichis supportedbythe501stCombat SupportWingof theUnitedStates AirForcesinEurope.
Itis importantfortheUSsecret services.
According to Britishinvestigative journalistDuncanCampbellandsurveillanceexpert, this site ispartof theECHELONnetwork.
The709thMilitaryIntelligenceBattalionas part of the66th Military Intelligence Brigadeof theUnited States Army Intelligence and Security Commandisstationedhere. Before 16 October2009 wasthe name of theunit109thMilitaryIntelligence Group.
Since 1966,theNationalSecurity Agencyresponsibleforthe operation of theUSportionof the plant. Some of the staffof thenow-closedBad Aibling Stationwasmoved here.